Listen to I Wish I Knew online. I Wish I Knew is an English language song and is sung by Wes Montgomery, Hank Jones, Ron Carter, Ray Barreto and Lex Humphries. I Wish I Knew, from the album 100 Jazz Masterpieces, Vol. 22, was released in the year 2012. The duration of the song is 5:26. Download English songs online from JioSaavn.